Continuous evaporation and concentration device for methyl phosphonyl aldehyde reaction liquid and concentration process

The invention discloses a continuous evaporation and concentration device for methyl phosphonyl aldehyde reaction liquid and a concentration process. The device comprises a reaction liquid storage tank, a delivery pump, a film evaporator, a 1 # methyl phosphonyl aldehyde storage tank, a 2 # methyl phosphonyl aldehyde storage tank, a gas condensation and collection device and a vacuum pump, whereinthe vacuum in the film evaporator is maintained under the operation action of the vacuum pump; the 1 # methyl phosphonyl aldehyde storage tank and the 2 # methyl phosphonyl aldehyde storage tank arestandby for each other, and when one tank is in a liquid storage state, the other tank discharges liquid. The concentration process comprises the following steps: 1) evaporating and preheating; 2) feeding control; 3) film evaporation; 4) gas-phase condensation and 5) vacuum replacement. According to the device, efficient and continuous evaporation of a solvent in the methyl phosphonyl aldehyde reaction liquid can be achiev